Problem with Lyx with Jabref

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I am working with the latest LyX + JabRef combo, under Xubuntu 12.10. Both the JabRef data base and the LyX document are based out of a Dropbox folder.
Prior to an Xubuntu upgrade (from 12.04 to 12.10) the functionality was as advertised: You set up the lyxserver in some location by pointing both JabRef and LyX to it via the appropriate menus in each; then you can simply highlight a citation in JabRef with CTRL-L, and the reference shows up in the main text. If you press CTRL-R, a PDF with a beautiful bibliography is generated, which includes both correct formatting and numbering.
After the
(HowTos)

Hi all,I'm looking for a program for organising my rather large collection of science related textbooks and papers. I've really narrowed it down to Mendeley vs JabRef, and was wondering if anyone could offer some comparison between the two, in the following aspects:1. I've got a rather old Thinkpad X40 (1Gb RAM, 1.6GHz cpu), so does anyone know what resources these programs use?